Online Tone generator 2
To play a constant tone, clickor press Space.
To change the frequency, drag the slider or press ← → (arrow keys). To adjust the frequency by 1 Hz, use the buttons or press Shift + ← and Shift + →. To adjust the frequency by 0.01 Hz, press Ctrl + ← and Ctrl + →; to adjust it by 0.001 Hz, press Ctrl + Shift + ← and Ctrl + Shift+ → To halve/double the frequency (go down/up one octave), clickand .
To change the wave type from a sine wave (pure tone) to a square/triangle/sawtooth wave, click thebutton.
You can mix tones by opening the Online Tone Generator in several browser tabs.
What can I use this tone generator for?
Tuning instruments, science experiments (what’s the resonant frequency of this wineglass?), testing audio equipment (how low does my subwoofer go?), testing your hearing (what’s the highest frequency you can hear? are there frequencies you can hear in only one ear?).
Alzheimer’s disease. There is some early-stage scientific evidence that listening to a 40 Hz tone can reverse some of the molecular changes in the brains of Alzheimer’s patients. This is one of these things that sound too good to be true, but early results are very promising. (Note that this tone generator is not a medical device — I don’t guarantee anything!)